v7db.files.GlobalAuthorisationProvider.java Source code

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Here is the source code for v7db.files.GlobalAuthorisationProvider.java

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/**
 * Copyright (c) 2011, Thilo Planz. All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package v7db.files;

import java.util.Properties;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;

import v7db.auth.AuthenticationToken;
import v7db.files.mongodb.V7File;

class GlobalAuthorisationProvider implements AuthorisationProvider {

    private final Properties props;

    GlobalAuthorisationProvider(Properties props) {
        this.props = props;
    }

    String getProperty(String name) {
        return props.getProperty(name);
    }

    private String getAnonymousUser() {
        return getProperty("auth.anonymous");
    }

    /**
     * handles anonymous user
     * 
     * @return null, if no access should be allowed
     */
    Object[] getRoles(AuthenticationToken user) {
        if (user == null || user == AuthenticationToken.ANONYMOUS) {
            String a = getAnonymousUser();
            if (StringUtils.isBlank(a))
                return null;
            return new String[] { a };
        } else {
            return user.getRoles();
        }
    }

    private boolean authorise(V7File resource, AuthenticationToken user, String permission) {
        Object[] roles = getRoles(user);
        if (roles == null)
            return false;

        String[] acl = StringUtils.stripAll(StringUtils.split(getProperty(permission), ','));
        for (Object role : roles) {
            if (ArrayUtils.contains(acl, role))
                return true;
        }
        return false;
    }

    public boolean authoriseOpen(V7File resource, AuthenticationToken user) {
        return authoriseRead(resource, user);
    }

    public boolean authoriseRead(V7File resource, AuthenticationToken user) {
        return authorise(resource, user, "acl.read");
    }

    public boolean authoriseWrite(V7File resource, AuthenticationToken user) {
        return authorise(resource, user, "acl.write");
    }

}